It's one of the books that I retained absolutely nothing from. Before reading it I had a general pop-culture idea of cognitive biases and behavioral science. After reaing the book - the exact same general feeling with no additional knowledge or insight acquired.
Fantastic book! But yes, Incredibly dense, but easy to read. Feels like 5 years of research is packed into each chapter (which I suppose is true).
But so worth it. I think about a concept from that book at least every week.